Chemical wastewater recycling device

Abstract

The invention discloses a chemical wastewater recycling device. The chemical wastewater recycling device comprises a catalytic oxidation tank, an oxidation stabilization tank, an after-biochemical BAF tank and a clear water tank which are successively connected with each other through a transmission pipeline, wherein a filter is connected to the inside of the catalytic oxidation tank through a water inlet pipeline; an ozone generator is connected to the inside of the catalytic oxidation tank through a gas pipeline; a water inlet hole, a water outlet hole and a reflowing hole are formed in the clear water tank; the water inlet hole of the clear water tank is connected with the after-biochemical BAF tank through the transmission pipeline; the water outlet hole of the clear water tank is connected to one end of a backwashing pump; carriers are prepared from the following components in parts by weight: high-density polyethylene, polypropylene resin, slaked lime, Dow powdered activated carbon, light calcium carbonate, maleic anhydride, diisopropylbenzene peroxide, gelatin, chitin and magnetic powder. According to the chemical wastewater recycling device, the removal rate of ammonia nitrogen is greater than 92%; the removal rate of COD is greater than 78%; the chemical wastewater recycling device is highly applicable to wastewater treatment under low-concentration condition.

Description

technical field [0001] The invention relates to a chemical sewage recycling device, which belongs to the technical field of petrochemical sewage. Background technique [0002] At present, the advanced treatment processes for high-salt sewage in the petrochemical industry mainly include biological oxidation and physical-chemical advanced oxidation. The biological oxidation method is represented by the MBR process, and its shortcoming lies in the biodegradability of high-salt advanced treatment sewage Extremely poor (BOD<10), the effect of the biochemical process is limited, and it cannot meet the requirements of the first-class standard for sewage discharge; the advanced oxidation process includes direct contact oxidation with ozone, Fenton reagent, etc., and its disadvantages are unstable treatment effect and high operating costs , produce secondary pollution, etc. Contents of the invention [0003] The purpose of the present invention is to provide a chemical sewage r...

AI Technical Summary

Problems solved by technology

[0002] At present, the advanced treatment process for high-salt sewage in petrochemical industry mainly includes biological oxidation method and physical-chemical advanced oxidation method. The biological oxidation method is represented by MBR process. Extremely poor (BOD<10), the effect of the biochemical process is limited, and it cannot meet the requirements of the first-class standard for sewage discharge; the advanced oxidation process includes direct contact oxidation with ozone, Fenton reagent, etc., and its disadvantages are unstable treatment effect and high operating costs , produce secondary pollution, etc.

Images